MESON Chess Problem Database

Problem Display
PID: 79374 (7b/1n3p2/2b1prpq/p4Nrp/4k1nR/QB1N2K1/5B2/3R4 w - - 0 1)

Pituk, Alexander

Hlas l'udu, 1976

7b/1n3p2/2b1prpq/p4Nrp/4k1nR/QB1N2K1/5B2/3R4

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Sd6#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sd8
      • 2.Sd6#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qf4#
      • 1...Kxf5
        • 2.Qf4#
      • 1...Rgxf5
        • 2.Qc4#
      • 1...Rfxf5
        • 2.Qe3#
      • 1...e5!
    • 1.Qb2?
      • threat
        • 2.Qe5#
      • 1...Rgxf5
        • 2.Qd4#
      • 1...Rfxf5
        • 2.Qe2#
      • 1...e5
        • 2.Qxe5#
      • 1...Kxf5!
    • 1.Qb4+?
      • 1...Kxf5
        • 2.Qf4#
      • 1...axb4!
    • 1.Qc5?
      • threat
        • 2.Qe5#
      • 1...Rgxf5
        • 2.Qd4#
        • 2.Qc4#
      • 1...Rfxf5
        • 2.Qe3#
      • 1...Sxc5
        • 2.Sd6#
      • 1...e5
        • 2.Qxe5#
      • 1...Bd5!
    • 1.Qa4+?
      • 1...Kxf5
        • 2.Qf4#
      • 1...Bxa4!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kxf5
        • 2.Qf4#
      • 1...Rgxf5
        • 2.Qd4#
      • 1...Rfxf5
        • 2.Re1#
      • 1...Sxd6
        • 2.Sxd6#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(k);N_GUARD::S(H)
    • S(k);N_GUARD::S(H),XS(k)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT,XS(H)::QAR1(C)
        • R(d);SBLOCK,XS(H)::QAR2(C)
        • R(h);SBLOCK,XS(H)::QAR1(C)
      • Refutation
        • P(g);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(d);SBLOCK,XS(H)::QAR1(C)
        • R(h);SBLOCK,XS(H)::QAR2(C)
        • P(g);::QAR1(C),XP(g)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT,XS(H)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_SPINS(b),OGATE,S_FLIGHT,XS(H)::QAR1(C)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(h);SBLOCK,XS(H)::QAR1(C)
        • S(k);N_GUARD,XQ(C)::S(H)
        • P(g);::QAR1(C),XP(g)
      • Refutation
        • B(f);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_SPINS(b),OGATE,S_FLIGHT,XS(H)::QAR1(C)
      • Refutation
        • B(f);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);N_SPINS(b),S_FLIGHT,XS(H)::QAR1(C)
      • R(d);SBLOCK,XS(H)::QAR1(C)
      • R(h);SBLOCK,XS(H)::R(A)
      • S(k);XQ(C)::S(H),XS(k)
      • P(g);::QAR1(C),XP(g)
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